HEYI Solar Current Sensor and Current Transformers: Safeguarding the Safety of Photovoltaic Systems

In photovoltaic power generation systems, every step of the power conversion process requires precise and safe monitoring and protection .

In this system , the HYCA Series current sensor and the KCT series current transformer act like two dutiful guardians , responsible for the two major tasks of “sensing” and “measuring,” working together to ensure the safe, stable, and efficient operation of the system.

HYCA series current sensors from HEYI: real-time monitoring and intelligent protection.

Such as HYCA-16-PD current sensor as an example, this product is a residual current detection module, which is mainly used for DC leakage current monitoring and fault detection in photovoltaic systems .

It can simultaneously monitor AC/DC composite residual current, making it a very comprehensive device. When an abnormal leakage current occurs in the system (such as insulation damage), it can automatically send a trip signal within approximately 30 milliseconds to prevent electric shock or equipment damage.

Key advantages of the HEYI HYCA series

Certified to IEC 62752 & IEC 62955 standards, meeting international safety standards for photovoltaic, EV charging piles , wind power generation , etc.

integrated use within photovoltaic inverters .

With a wide temperature range of -40 to +85℃, it can easily cope with outdoor high temperatures and severe cold.

The self-test and automatic calibration functions can simulate leakage current detection before startup to ensure that the system is safe and reliable before each operation.

In photovoltaic systems, the inverter is the most critical yet most vulnerable component. A current sensor like the HYCA-16-PD can monitor the system’s insulation status in real time.

If an abnormal leakage current is detected, it triggers a protection mechanism, disconnecting the inverter from the grid to prevent accidents.
Simply put, it acts like a “smart power outage manager” ensuring power production while also protecting the safety of people and equipment.

HEYI KCT series current transformers: precise measurement, efficient management

HEYI KCT series is a typical Split core current transformer, mainly used for current sampling and power measurement.

In photovoltaic system, its task is to accurately feed back the actual flow of solar current to the monitoring system, so that operation and maintenance personnel can clearly see the power generation performance of each branch.

Technical highlights:

open-type structure (Clamp-on Design) allows for direct installation without disconnecting the cable, making maintenance more convenient.

The compact design and high-quality flame-retardant shell with UL94-V0 certification ensure safety, reliability, and durability, making it suitable for use in confined photovoltaic combiner boxes or inverter interiors.

With a wide measurement range (5A~1000A) and a frequency of 50Hz-2kHz, it can meet the needs of various scenarios from ordinary household photovoltaic systems to large power plants.

High insulation class (2.5kV withstand voltage) + low phase error (≤±60min) ensures accurate and stable measurement results.

Multiple output options (0.333V/AC or 0-500mA) facilitate connection to monitoring systems or power metering modules.

precise management of every watt of electricity .” HEYI KCT open-type current transformers can help the system measure the generated current in real time, determine whether each string of modules is outputting normally, and identify problems such as aging or loss.

It’s more like the system’s “current eye” allowing every bit of electrical energy to be accurately calculated and optimized for use.

 Perfect Integration in Photovoltaic Systems

Functional components	HYCA-16-PD (Current Sensor)	KCT series (current transformers)
Main function	Leakage detection and safety protection	Current Measurement and Energy Management
Output signal	High/low level digital signals	Analog voltage/current signal
Installation location	Photovoltaic inverter or distribution box	Photovoltaic combiner boxes and distribution cabinets
Application goals	Protect personal and equipment safety	Optimize system efficiency and monitoring performance

 

When used together, the photovoltaic system can not only detect whether the current of each power generation circuit is normal, but also protect against possible leakage risks in real time.

This not only improves operational efficiency for modern photovoltaic power plants, but also enhances system safety.

Why are HEYI CT and CS products more suitable for photovoltaic systems

High reliability: It can still operate stably in high temperature, high humidity and strong radiation environments.

Compliant with international standards and certifications: Meets IEC safety requirements and is suitable for the global photovoltaic market.

Easy installation : Modular and hinged design makes integration easier.

Precise and intelligent detection : Supports automatic calibration, self- testing , and digital output.

Relatively high cost performance : Compared with major international brands , it has the same functions but is more competitive in cost.

Conclusion: Safeguarding Clean Energy Sources such as Photovoltaics

As the global energy transition accelerates, photovoltaic (PV) systems are rapidly gaining popularity. Behind this, core components like the HEYI HYCA-16-PD current sensor and the HEYI KCT open-type current transformer are quietly enhancing the system’s safety and intelligence.
They are not merely electronic components, but rather the nerves and senses of the PV system, making clean energy safer and more efficient.

Compay：HEYI Electrical Co., Ltd.

Brand: HEYI/ASCT

Contact: Bethy

E-mail: heyi@heyiele.com             

Tel: 86-13968747975

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